Monami, a mother deeply devoted to her son Kenichi, finds her life turned upside down when Kenichi's classmates—mischievous delinquents—bully him relentlessly for being a bookworm. Among them, one boy named Ryuji, cunning and manipulative, hatches a devious plan. He slips a pornographic magazine into Kenichi's bag and tricks him into telling his mother, "Kenichi said he'll let you see his test paper if you give him a porn magazine," setting up a cheating scandal. Devastated and desperate to protect her son, Monami is forced to submit to Ryuji's demands. She endures having her large breasts groped and is drawn into explicit sexual acts just like those depicted in the porn she was framed with. The harassment from these horny brats intensifies, escalating beyond control, reducing Monami to a mere plaything as they dominate her body completely. Through this torment, she begins to confront her own hidden emotions and awakening desires.